Dell GCR-8481B Service Manual

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Brand: Dell

Category: CD/CDR Drive

Type: Service manual for Dell GCR-8481B

Pages: 24

Download Dell GCR-8481B Service manual

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INTRODUCTION
GENERAL FEATURE
SPECIFICATIONS
1. MODEL: GCR-8481B
1) SUPPORTED SYSTEM
IBM Compatible 486SX or Above (With PIO mode 4 recommended)
2) SUPPORTED OS
3) GENERAL PERFORMANCE
Data Transfer Rate .........................................................................................Sustained Data Transfer Rate
20Times Speed (Inner side) : 3,000 kbytes/sec
48 Times Speed (max., Outer side) : 7,200 kbytes/sec
Data Buffer Capacity.....................................................................................................................128 kbytes
Average Access Time ........................................................................Random Access Time : 75 ms Typical
4) POWER REQUIREMENTS
Voltage ......................................................................................................................................+5V DC +5%
+12V DC +5%
Ripple ..................................................................................................................+5V : Less than 100mVp-p
+12V : Less than 100mVp-p
Current .......................................................................................................................+5V : 0.9A (Maximum)
+12V : 1.5A (Maximum)
5) AUDIO PERFORMANCE
Frequency Response.....................................................................................................20Hz~20KHz(+3dB)
S/N Ratio (IHF-A+20 KHz LPF) .......................................................................80 dB (Typical at 1 KHz 0dB)
75 dB (Limit at 1 KHz 0dB)
T.H.D. (IHF-A+20 KHz LPF) ............................................................................0.05% (Typical at 1 KHz 0dB)
0.15% (Limit at 1 KHz 0dB)
Channel Separation (IHF-A+20 KHz LPF) .............................................................................80 dB (Typical)
70 dB (Limit)
Output Level (1kHz 0dB) 47K Load ....................................................................................0.7Vrms + 10%
Headphone Level (1kHz 0dB) 33 Load...............................................................................0.7Vrms +
20%
Enhanced IDE interface
Internal 5.25 inch, halfheight CD-ROM Drive
Fast 75ms Average Access Time
Max 7,200KB/sec Sustained Transfer rate (GCR-8481B)
Max 7,800KB/sec Sustained Transfer rate (GCR-8521B)
Photo-CD Multisession Disc Spec compliant
Multimedia MPC-3 Spec compliant
Power Tray Loading/Ejection Mechanism
3 Way Eject support
(Software, O/C Button, Emergency Eject)
Closed Enclosure
Built-in ATAPI Interface Controller
Software Volume Control
8 Times Digital Filter for CD Audio
Built-in MODE-1 ECC/EDC
MTBF 125,000h POH (at 10% Utilization)
PIO Mode 4 & Multi DMA Mode 2 support
Horizontal or Vertical Mounting
Digital audio output connector
Digital audio through ATAPI Interface
Subcode (P-W) through ATAPI Interface
Spin-down Mode for energy saving
• MS-DOS Version 3.1 or Higher
Windows '95/'98/’2000/Me/XP
Solaris Ver 2.4 or Higher
Linux slackware Ver 2.3
Windows NT 4.0 or later
OS/2 Warp (Ver 3.0)
This service manual provides a variety of service
information. It contains the mechanical structure of
the CD-ROM Drive together with mechanical
adjustments and the electronic circuits in schematic
form. This CD-ROM Drive was manufactured and
assembled under our strict quality control standards
and meets or exceeds industry specifications and
standards.